Original Research
The thermal effects of pulsed ultrasound
South African Journal of Physiotherapy | Vol 37, No 1 | a772 |
DOI: https://doi.org/10.4102/sajp.v37i1.772
| © 2018 V. Sandler, P. Feingold
| This work is licensed under CC Attribution 4.0
Submitted: 27 September 2018 | Published: 31 March 1981
Submitted: 27 September 2018 | Published: 31 March 1981
About the author(s)
V. Sandler, University of Witwatersrand, Johannesburg, South AfricaP. Feingold, University of Witwatersrand, Johannesburg, South Africa
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Heat production by pulsed ultrasound was investigated. Four thermocouples were inserted into the thighs of each of six rabbits at specified depths. Temperature changes were recorded during insonation at different frequencies, intensities and duration of insonation. Significant thermal effects were recorded at both pulse ratios. These temperature increases were greater using a pulse ratio of 1:1 than a pulse ratio of 1:4, but less than those produced by a continuous beam.
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